[Magnetic resonance with an endorectal coil and a fast spin echo sequence in the staging of prostatic carcinoma. The correlation with histopathological data].
BACKGROUND
We investigated the accuracy of endorectal coil Magnetic Resonance Imaging (MRI) and Fast Spin Echo (FSE) technique in staging prostate cancer.


METHODS
MRI was performed in 70 patients with biopsy proved prostatic cancer. A total of 33 patients subsequently underwent radical prostatectomy. T2-weighted FSE sequences (TR 3400-4100, TE 120, Echo train length 13) were acquired in all patients. Axial, sagittal and coronal 4-5 mm images were obtained with 13-14 cm field of view and 256 x 256 matrix. Additional T1-weighted spin echo images were acquired in 9 patients. Lesion staging on MR images was performed according to the American Urological System. MR data were compared with the pathologic findings of whole-mount sections of the surgical specimens.


RESULTS
Overall accuracy for endorectal coil MR imaging was 60%; ten cases were underestimated and 3 cases were overestimated. The sensitivity and the specificity of endorectal coil MRI in diagnosing capsular penetration were 77% and 81%, respectively. Seminal vesicle invasion was detected with 87% sensitivity and 96% specificity.


CONCLUSIONS
Endorectal coil MRI provides a more accurate preoperative local staging.
Masi
A
A
U.O. Radiologia, Osp. S. Maria Nuova, Firenze.
Olmastroni
M
M
Marin
E
E
Consalvo
M
M
Lascialfari
L
L
Ricupero
L
L
Nicita
G
G
Villari
D
D
Amorosi
A
A
Villari
N
N
D000368:Aged; D000369:Aged, 80 and over; D001707:Biopsy, Needle; D002277:Carcinoma / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D005500:Follow-Up Studies; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000295:instrumentation* / Q000379:methods; D008297:Male; D008875:Middle Aged; D009361:Neoplasm Invasiveness; D009367:Neoplasm Staging; D011467:Prostate / Q000473:pathology*; D011468:Prostatectomy; D011471:Prostatic Neoplasms / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D012007:Rectum; D012680:Sensitivity and Specificity
Risonanza Magnetica con bobina endorettale e sequenza Fast Spin Echo nella stadiazione del carcinoma prostatico. Correlazione con i dati istopatologici.